People who take regular exercise could reduce their risk of developing around two dozen physical and mental health conditions -- including some cancers and dementia -- and slow down how quickly their body deteriorates as they age...

The benefits are pretty amazing. They affect:

cancer

heart disease

stroke

dementia

depression

obesity

type 2 diabetes

high blood pressure

That's a pretty amazing list. How much exercise are you suppose to get if you want to take advantage of all of these benefits? According to the American Heart Association, you should try to get at least 150 minutes of moderate exercise (e.g. walking) per week. They'd like you to be doing more, including some weight training and high-intensity cardio stuff, but the 150 minutes is a baseline. So if you took a 30 minute (about a mile and a half or two miles) walk 5 days a week, you're done.